Web of Semantic: Universal Journal on Ie Education issn

Incorrectly selected oil. In particular, its viscosity, especially for low-temperature viscosity. If it 
thickens in the cold, then it is difficult for the pump to pump it through the system and the pressure in 
it is insufficient, which is recorded by the corresponding sensor. Similarly, during the operation of 
the machine, the viscosity changes (or the oil simply gets dirty), so there may be a situation when the 
pressure sensor is triggered in certain situations and the oil pan indicator will either light up or blink.
Figure 4. Viscosity of various oils at temperature 
Poor-quality oil filter. A normal oil filter always contains a certain amount of engine oil. This is 
done in order to avoid oil starvation when starting the engine. This possibility is realized by 
introducing a check valve or a shut-off washer into its design. These elements provide oil locking 
when the engine is turned off. However, on low-quality filters, these elements may either not be 
present at all or do not fully perform their task.

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Web of Semantic: Universal Journal on Ie Education ISSN:
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338
Figure 5. Oil filters 
Accordingly, the oil from the filter drains back into the sump pan, and after starting the engine for the 
first few seconds it gains pressure. This is a very bad situation, since this leads to increased wear of 
parts, which means a decrease in their overall service life. Usually, after starting the engine, the oil 
lamp lights up.
Pressure reducing valve of the oil pump. This element performs an important function in the car's 
oil system, namely regulates, does not significantly increase or decrease the oil level in it. Both of 
these situations negatively affect the operation of the engine and its individual components. Most 
often, in this context, the valve spring breaks.
Or it simply stretches due to the wear and tear or poor quality of the steel from which it is made. 
Another option is that over time, the valve lumen becomes clogged. This is especially true if the car 
is filled with poor-quality dirty oil or the oil filter is already very worn out. When the pressure 
reducing valve fails, the oil pressure increases sharply when the engine speed is high.